This is the Circle of Presence adapted from John Michael Greer's "
A Lesser Ritual of the Pentagram for Polytheists" which I have found indispensable. All credit for this goes to him.
Stand facing East. Raise your hands from your sides in an arc until your palms join above your head, fingers pointing up. Draw your joined hands down to your forehead, visualizing light descending from infinite space to a point above your head, and say, "In the name of..."
Draw your joined hands down to your heart, visualize a ray of light descending from above your head to the center of the earth, and vibrate the name (PERUN).
Now separate your hands, and touch your right shoulder with the fingertips of your left hand and your left shoulder with the fingertips of your right hand, the hands crossing at the wrist. Say:"...my patron God… PERUN"
Now raise the elbows straight up and bring your hands up, out, and down in a circular motion, bringing them back together palm to palm in front of your lower abdomen or groin (depending on your body's proportions). Visualize your fingertips tracing a circle of light. As you do this say: "..I place myself within the circle of His presence..."
Now bring the joined hands up to your heart again, fingertips pointing upwards. Visualize the shaft of light descending from infinite space to the center of the earth, the circle of light you drew with your hands, and your heart shining like a sun. Say: "...and protection."
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I have had very good results with this so far.
Note I have not included the pentagram banishing ritual itself here since I use it with Greek Gods, but do check out Greer's original post.